On 7/2/20 8:22 AM, Irene Park wrote:
Hello Ard, Would you please kindly review this change? Thank you, Irene
Merged as #753, apologies for the delay. Please double check the version I committed - I cleaned up the code slightly
-----Original Message----- From: Samer El-Haj-Mahmoud <samer.el-haj-mahm...@arm.com> Sent: Monday, June 22, 2020 5:01 PM To: devel@edk2.groups.io; Irene Park <ip...@nvidia.com>; Ard Biesheuvel <ard.biesheu...@arm.com> Subject: RE: [edk2-devel] [PATCH v2] ArmPlatformPkg/PL011UartLib: Check PID2 if FiFoDepth is zero External email: Use caution opening links or attachments Adding Ard's new Arm e-mail address, and removing the old Linaro e-mail. Thanks, --Samer-----Original Message----- From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Irene Park via groups.io Sent: Monday, June 22, 2020 4:15 PM To: devel@edk2.groups.io; ard.biesheu...@linaro.org Subject: Re: [edk2-devel] [PATCH v2] ArmPlatformPkg/PL011UartLib: Check PID2 if FiFoDepth is zero Hi Ard, Would you please review this change ? I also wonder what you think of the following. #if FixedPcdGet16 (PcdUartDefaultReceiveFifoDepth) == 0 VS if (FixedPcdGet16 (PcdUartDefaultReceiveFifoDepth) == 0) or if (HardwareFifoDepth == 0) Thank you, Irene -----Original Message----- From: Irene Park <ip...@nvidia.com> Sent: Tuesday, June 9, 2020 1:59 PM To: devel@edk2.groups.io Cc: Irene Park <ip...@nvidia.com> Subject: [PATCH v2] ArmPlatformPkg/PL011UartLib: Check PID2 if FiFoDepth is zero From: Irene Park <ip...@nvidia.com> PL011UartLib determines its FIFO depth based on the PID2 value but the register PID2 is not mandatory as per the SBSA spec. This change won't check PID2 if PcdUartDefaultReceiveFifoDepth is set to a value > 0. Signed-off-by: Irene Park <ip...@nvidia.com> --- ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c | 4 ++++ ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf | 1 + 2 files changed, 5 insertions(+) diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c index 801990d..05ad1ad 100644 --- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c +++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c @@ -79,9 +79,13 @@ PL011UartInitializePort ( UINT32 Fractional; UINT32 HardwareFifoDepth; + HardwareFifoDepth = FixedPcdGet16 (PcdUartDefaultReceiveFifoDepth); +#if FixedPcdGet16 (PcdUartDefaultReceiveFifoDepth) == 0 HardwareFifoDepth = (PL011_UARTPID2_VER (MmioRead32 (UartBase + UARTPID2)) \ > PL011_VER_R1P4) \ ? 32 : 16 ; +#endif + // The PL011 supports a buffer of 1, 16 or 32 chars. Therefore we can accept // 1 char buffer as the minimum FIFO size. Because everything can be rounded // down, there is no maximum FIFO size. diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf index d99e89f..e3da507 100644 --- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf +++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf @@ -30,6 +30,7 @@ ArmPlatformPkg/ArmPlatformPkg.dec [FixedPcd] + gEfiMdePkgTokenSpaceGuid.PcdUartDefaultReceiveFifoDepth gEfiMdeModulePkgTokenSpaceGuid.PcdSerialBaudRate gArmPlatformTokenSpaceGuid.PL011UartInteger -- 2.7.4IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
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